Product overview
The GEPRC DoMain4.2 HD O3 is a consumer freestyle FPV flight platform equipped with flight electronics, propulsion and O3 video hardware. Its GEP-DoMain frame has a 194mm wheelbase and a compact DC layout that keeps propellers outside the camera view. The structure combines a 2mm top plate, 2.5mm base plate, 3mm midplate and 4.0mm arms. Integrated side panels accept custom decals, and the drone supports either a full-size GoPro or a naked GoPro for additional camera integration. Its specified weight is 310g ±5g.
The electronics comprise a TAKER F722 SE flight controller, TAKER E55A 32Bit 4IN1 ESC, STM32F722RET6 MCU, MPU6000 gyro and AT7456E OSD. SPEEDX2 2105.5 2650KV motors pair with GEMFAN 4023 – 3 propellers, while an O3 Air Unit and O3 camera provide the video configuration. Options include PNP, ELRS 2.4G and TBS Nano RX, each also offered with GPS. The recommended battery is Lipo 6S 1050-1300mah, and the connector is XT60. Supplied equipment includes the drone, a propeller pair, battery ties, spare screws, two L-shaped screwdrivers, an M8 wrench and side panels.
Specifications
| Specification | Value & conditions |
|---|---|
| Product identity and purpose | GEPRC DoMain4.2 HD O3 freestyle FPV drone |
| Product name | 4.2DoMain |
| Frame | GEP-DoMain |
| Wheelbase | 194mm |
| Top plate thickness | 2mm |
| Base plate thickness | 2.5mm |
| Arm thickness | 4.0mm |
| Midplate thickness | 3mm |
| Flight controller | TAKER F722 SE |
| ESC | TAKER E55A 32Bit 4IN1 |
| MCU | STM32F722RET6 |
| Gyroscope | MPU6000 |
| OSD | AT7456E |
| Video transmitter | O3 Air Unit |
| Camera | O3 camera |
| Antenna | 5.8G&2.4G |
| Motor | SPEEDX2 2105.5 2650KV (M5 Shift) |
| Propellers | GEMFAN 4023 – 3 |
| Weight | 310g ±5g |
| Receiver | PNP/ TBS NanoRX / GEPRC ELRS2.4 |
| Recommended battery | Lipo 6S 1050-1300mahRecommended battery configuration. |
| Connector | XT60 |
| Configuration options | PNP, ELRS 2.4G, TBS Nano RX, PNP With GPS, ELRS 2.4G With GPS, TBS Nano RX With GPS |
| Side panels | Integrated side panels support custom decals. |
| Frame layout | Compact DC layout with integrated packaging and propellers outside the camera view. |
| Action-camera integration | Supports a full-size GoPro or naked GoPro. |
| Included equipment | 1 x DoMain; 2 x GEMFAN 4023 – 3 (1 pair); 2 x M15*200mm battery cable ties; 1 x spare screw bag; 1 x 1.5mm L-shaped screwdriver; 1 x 2mm L-shaped screwdriver; 1 x M8 wrench; 1 x left and right side panels. |
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